10970results about "Tunnels" patented technology

A method and apparatus for creating multiple branch wells from a parent well is disclosed. A multiple branching sub is provided for placement at a branching node of a well. Such sub includes a branching chamber and a plurality of branching outlet members. The outlet members during construction of the branching sub, have previously been distorted into oblong shapes so that all of the branching outlet members fit within an imaginary cylinder which is coaxial with and substantially the same radius as the branching chamber. After deployment of the branching sub via a parent casing in the well, a forming tool is lowered to the interior of the sub. The outlet members are extended outwardly by the forming tool and simultaneously formed into substantially round tubes. Next, each outlet member is plugged with cement, after which each branch well is drilled through a respective outlet member. If desired, each branch may be lined with casing and sealed to a branching outlet by means of a casing hanger. A manifold placed in the branching chamber controls the production of each branch well to the parent well.

A mining machine includes a cutting mechanism with an arm, and a substantial weight of more than a thousand pounds attached to the arm. The mining machine also includes a first disc cutter adapted to engage the material to be mined and mounted on a first disc cutter assembly for eccentrically driving the first disc cutter, the first disc cutter assembly being mounted within the substantial weight. The mining machine also includes at least a second disc cutter spaced apart from the first disc cutter assembly and adapted to engage the material to be mined, and mounted on a second disc cutter assembly for eccentrically driving the second disc cutter, the second disc cutter assembly being mounted within the substantial weight.

The invention discloses a drilling and bursting type heading machine which comprises a drilling and bursting device, an angle control device, a front-back telescopic device and a cantilever type heading machine body. The drilling and bursting device is installed on a front-back moving component of the front-back telescopic device. The front-back telescopic device is installed on the cantilever type heading machine body. The drilling and bursting device comprises a fixing frame, a rock drill component and a bursting device component, wherein the rock drill component and the bursting device component are fixed to and installed on the fixing frame. The angle control device comprises an installation base, an auxiliary rotary hydraulic motor, an adjusting hydraulic cylinder and a main rotary hydraulic motor. When the front-back moving component of the front-back telescopic device completely stretches out, the distance between the front end of the drilling and bursting device and a working surface is smaller than the distance between the front end of a cutting head of the cantilever type heading machine body and the working surface. The drilling and bursting type heading machine is compact in structure, a hard rock stratum with the rock stratum hardness being larger than 10 can be rapidly drilled and burst on the premise that the energy consumption is not increased, and accordingly the purposes of improving the heading efficiency and reducing potential safety hazards are achieved.